Cobbler's Hill. The Misses Teachout, #1

Corwyn Teachout has a knack for finding people.  Her sister, Gwen, has a knack for hurting them.  That should be enough to keep them alive after their mother dies and the orphanage burns down, at least until they're both old enough to join a gang and start down the long road to ruling the criminal underworld. But the Teachouts live in Cobbler's Hill, black, withered heart of the city of San Xavier, home to alchemical engineers, witches, gang lords, and monsters both clockwork and flesh.
The Hill and its denizens have plans for the girls, from tracking a lost fiancée to fighting the heirs to gangsters' empires, from becoming the protegees of the Hill's Old Lady to piecing together the murder of the city's most notorious gang lord.  And that doesn't even take into account the house that likes to eat people.  It's possible that becoming legendary is a crookeder path than they expected. It's possible the Teachouts are about to make their own.